<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .button {
          display: flex;
          align-items: center; /*垂直居中*/
          justify-content: center;
          background-color: palevioletred;
          border: none;
          color: #fff;
          border-radius: 20px;
          padding: 3px 20px;
        }
        /*按扭图标样式*/
        .button .icon {
          margin-right: 5px;
          width: 20px;
          height: 20px;
          background: url("../meinv.jpg") no-repeat;
          background-size: cover;
        }
      </style>
</head>
<body>
    <button class="button">
      <span class="icon"></span>
      找相似
    </button>
  </body>
</html>